:root {
  --bg: #f4f1ec;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --btn-bg: #ffffff;
  --btn-border: #e3ded6;
  --btn-hover: #1c1c1e;
  --btn-hover-fg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --fg: #f2f2f3;
    --muted: #9a9aa2;
    --btn-bg: #1d1d21;
    --btn-border: #2c2c32;
    --btn-hover: #f2f2f3;
    --btn-hover-fg: #121214;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.card {
  width: 100%;
  max-width: 480px;
  padding: 56px 16px 48px;
  text-align: center;
}

.avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  display: block;
  margin: 0 auto 16px;
}

h1 {
  margin: 0 0 6px;
  font-size: 1.5rem;
  font-weight: 650;
}

.bio {
  margin: 0 0 32px;
  color: var(--muted);
}

.links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.link {
  display: block;
  padding: 16px 20px;
  border: 1px solid var(--btn-border);
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}

.link:hover,
.link:focus-visible {
  background: var(--btn-hover);
  color: var(--btn-hover-fg);
  transform: translateY(-1px);
}

.link:focus-visible {
  outline: 3px solid var(--muted);
  outline-offset: 2px;
}